Ongoing, feel free to contact me with omitted species and evidence of their availability past or present in the UK. Thanks, Viv.
Battus crassus, the Crassus swallowtail, is a species of butterfly from the family Papilionidae.
Battus belus, the Belus swallowtail is a species of butterfly from the family Papilionidae that is found in Brazil, Colombia, Guatemala, Peru and Venezuela.
Battus polydamas, also known as the gold rim swallowtail, the Polydamas swallowtail or the tailless swallowtail, is a species of butterfly in the family Papilionidae. The species was first described by Carl Linnaeus in his 10th edition of Systema Naturae, published in 1758.